Conan O'Brien Supporters Rally in the Rain

Conan O'Brien Supporters

Rally in the Rain

1/18/2010 7:30 PM PST BY TMZ STAFF

Conan O'Brien supporters gathered at Universal Studios in Hollywood today -- in the rain -- to protest NBC's mistreatment of their giant, red-headed late night hero.

The protest -- which gained a lot of support on Facebook -- was set to start at 12 PM PT, but a bunch of Conan's brave, raincoat-clad faithful have been hanging around near the "The Tonight Show" studio for hours.

Jeff Zucker was not one of those people -- but Andy Richter, Masturbating Bear and La Bamba all addressed the crowd.

We're told "The Tonight Show" has handed out doughnuts and coffee to the supporters.

BTW: Conan rallies are also set to go off today outside of NBC studios in Chicago and 30 Rockefeller Center in New York City.